1 /* 2 * Copyright (c) 1980, 1988 Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms are permitted 6 * provided that the above copyright notice and this paragraph are 7 * duplicated in all such forms and that any documentation, 8 * advertising materials, and other materials related to such 9 * distribution and use acknowledge that the software was developed 10 * by the University of California, Berkeley. The name of the 11 * University may not be used to endorse or promote products derived 12 * from this software without specific prior written permission. 13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 15 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 16 */ 17 18 #if defined(LIBC_SCCS) && !defined(lint) 19 static char sccsid[] = "@(#)fstab.c 5.7 (Berkeley) 08/18/89"; 20 #endif /* LIBC_SCCS and not lint */ 21 22 #include <fstab.h> 23 #include <unistd.h> 24 #include <stdio.h> 25 26 static FILE *_fs_fp; 27 static struct fstab _fs_fstab; 28 29 static 30 fstabscan() 31 { 32 register char *cp; 33 #define MAXLINELENGTH 100 34 static char line[MAXLINELENGTH]; 35 char subline[MAXLINELENGTH]; 36 char *fgets(), *strtok(); 37 38 for (;;) { 39 if (!(cp = fgets(line, sizeof(line), _fs_fp))) 40 return(0); 41 _fs_fstab.fs_spec = strtok(cp, " \t\n"); 42 _fs_fstab.fs_file = strtok((char *)NULL, " \t\n"); 43 _fs_fstab.fs_vfstype = strtok((char *)NULL, " \t\n"); 44 _fs_fstab.fs_mntops = strtok((char *)NULL, " \t\n"); 45 if (_fs_fstab.fs_mntops == NULL) 46 goto bad; 47 _fs_fstab.fs_freq = 0; 48 _fs_fstab.fs_passno = 0; 49 if ((cp = strtok((char *)NULL, " \t\n")) != NULL) { 50 _fs_fstab.fs_freq = atoi(cp); 51 if ((cp = strtok((char *)NULL, " \t\n")) != NULL) 52 _fs_fstab.fs_passno = atoi(cp); 53 } 54 strcpy(subline, _fs_fstab.fs_mntops); 55 for (cp = strtok(subline, ","); cp; 56 cp = strtok((char *)NULL, ",")) { 57 if (strlen(cp) != 2) 58 continue; 59 if (!strcmp(cp, FSTAB_RW)) { 60 _fs_fstab.fs_type = FSTAB_RW; 61 break; 62 } 63 if (!strcmp(cp, FSTAB_RQ)) { 64 _fs_fstab.fs_type = FSTAB_RQ; 65 break; 66 } 67 if (!strcmp(cp, FSTAB_RO)) { 68 _fs_fstab.fs_type = FSTAB_RO; 69 break; 70 } 71 if (!strcmp(cp, FSTAB_SW)) { 72 _fs_fstab.fs_type = FSTAB_SW; 73 break; 74 } 75 if (!strcmp(cp, FSTAB_XX)) { 76 _fs_fstab.fs_type = FSTAB_XX; 77 break; 78 } 79 } 80 if (cp != NULL) 81 return(1); 82 bad: 83 /* no way to distinguish between EOF and syntax error */ 84 (void)write(STDERR_FILENO, "fstab: ", 7); 85 (void)write(STDERR_FILENO, _PATH_FSTAB, 86 sizeof(_PATH_FSTAB) - 1); 87 (void)write(STDERR_FILENO, ": syntax error.\n", 16); 88 } 89 /* NOTREACHED */ 90 } 91 92 struct fstab * 93 getfsent() 94 { 95 if (!_fs_fp && !setfsent() || !fstabscan()) 96 return((struct fstab *)NULL); 97 return(&_fs_fstab); 98 } 99 100 struct fstab * 101 getfsspec(name) 102 register char *name; 103 { 104 if (setfsent()) 105 while (fstabscan()) 106 if (!strcmp(_fs_fstab.fs_spec, name)) 107 return(&_fs_fstab); 108 return((struct fstab *)NULL); 109 } 110 111 struct fstab * 112 getfsfile(name) 113 register char *name; 114 { 115 if (setfsent()) 116 while (fstabscan()) 117 if (!strcmp(_fs_fstab.fs_file, name)) 118 return(&_fs_fstab); 119 return((struct fstab *)NULL); 120 } 121 122 setfsent() 123 { 124 if (_fs_fp) { 125 rewind(_fs_fp); 126 return(1); 127 } 128 return((_fs_fp = fopen(_PATH_FSTAB, "r")) != NULL); 129 } 130 131 void 132 endfsent() 133 { 134 if (_fs_fp) { 135 (void)fclose(_fs_fp); 136 _fs_fp = NULL; 137 } 138 } 139